<!--
  Any copyright is dedicated to the Public Domain.
  http://creativecommons.org/publicdomain/zero/1.0/
-->
<html>
<head>
  <title>Indexed Database Property Test</title>

  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

  <script type="text/javascript;version=1.7">
  /**
   * Test that a put of a file-backed Blob/File whose backing file has been
   * deleted results in a failure of that put failure.
   *
   * In order to create a file-backed Blob and ensure that we actually try and
   * copy its contents (rather than triggering a reference-count increment), we
   * use two separate databases.  This test is derived from
   * test_file_cross_database_copying.html.
   */
  function testSteps()
  {
    const READ_WRITE = "readwrite";

    const databaseInfo = [
      { name: window.location.pathname + "1", source: true },
      { name: window.location.pathname + "2", source: false }
    ];

    const objectStoreName = "Blobs";

    const fileData = { key: 1, file: getRandomFile("random.bin", 10000) };

    SpecialPowers.pushPrefEnv({ set: [["dom.indexedDB.dataThreshold", -1]] },
                              continueToNextStep);
    yield undefined;

    // Open both databases, put the File in the source.
    let databases = [];
    for (let info of databaseInfo) {
      let request = indexedDB.open(info.name, 1);
      request.onerror = errorHandler;
      request.onupgradeneeded = grabEventAndContinueHandler;
      request.onsuccess = grabEventAndContinueHandler;
      let event = yield undefined;

      is(event.type, "upgradeneeded", "Got correct event type");

      let db = event.target.result;
      // We don't expect any errors yet for either database, but will later on.
      db.onerror = errorHandler;

      let objectStore = db.createObjectStore(objectStoreName, { });
      if (info.source) {
        objectStore.add(fileData.file, fileData.key);
      }

      event = yield undefined;

      is(event.type, "success", "Got correct event type");

      databases.push(db);
    }

    // Get a reference to the file-backed File.
    let fileBackedFile;
    for (let db of databases.slice(0, 1)) {
      let request = db.transaction([objectStoreName])
                      .objectStore(objectStoreName).get(fileData.key);
      request.onsuccess = grabEventAndContinueHandler;
      event = yield undefined;

      let result = event.target.result;
      verifyBlob(result, fileData.file, 1);
      yield undefined;

      fileBackedFile = result;
    }

    // Delete the backing file...
    let fileFullPath = getFilePath(fileBackedFile);
    // (We want to chop off the profile root and the resulting path component
    // must not start with a directory separator.)
    let fileRelPath =
      fileFullPath.substring(fileFullPath.search(/[/\\]storage[/\\]default[/\\]/) + 1);
    info("trying to delete: " + fileRelPath);
    // by using the existing SpecialPowers mechanism to create files and clean
    // them up.  We clobber our existing content, then trigger deletion to
    // clean up after it.
    SpecialPowers.createFiles(
      [{ name: fileRelPath, data: '' }],
      grabEventAndContinueHandler, errorCallbackHandler);
    yield undefined;
    // This is async without a callback because it's intended for cleanup.
    // Since IDB is PBackground, we can't depend on serial ordering, so we need
    // to use another async action.
    SpecialPowers.removeFiles();
    SpecialPowers.executeAfterFlushingMessageQueue(grabEventAndContinueHandler);
    yield undefined;
    // The file is now deleted!

    // Try and put the file-backed Blob in the database, expect failure on the
    // request and transaction.
    info("attempt to store deleted file-backed blob"); // context for NS_WARN_IF
    for (let i = 1; i < databases.length; i++) {
      let db = databases[i];

      let trans = db.transaction([objectStoreName], READ_WRITE);
      let objectStore = trans.objectStore(objectStoreName);

      request = objectStore.add(fileBackedFile, 2);
      request.onsuccess = unexpectedSuccessHandler;
      request.onerror = expectedErrorHandler("UnknownError");
      trans.onsuccess = unexpectedSuccessHandler;
      trans.onerror = expectedErrorHandler("UnknownError");
      // the database will also throw an error.
      db.onerror = expectedErrorHandler("UnknownError");
      event = yield undefined;
      event = yield undefined;
      event = yield undefined;
      // the database shouldn't throw any more errors now.
      db.onerror = errorHandler;
    }

    // Ensure there's nothing with that key in the target database.
    info("now that the transaction failed, make sure our put got rolled back");
    for (let i = 1; i < databases.length; i++) {
      let db = databases[i];

      let objectStore = db.transaction([objectStoreName], "readonly")
                          .objectStore(objectStoreName);

      // Attempt to fetch the key to verify there's nothing in the DB rather
      // than the value which could return undefined as a misleading error.
      request = objectStore.getKey(2);
      request.onsuccess = grabEventAndContinueHandler;
      request.onerror = errorHandler;
      event = yield undefined;

      let result = event.target.result;
      is(result, undefined, "no key found"); // (the get returns undefined)
    }

    finishTest();
    yield undefined;
  }
  </script>
  <script type="text/javascript;version=1.7" src="file.js"></script>
  <script type="text/javascript;version=1.7" src="helpers.js"></script>

</head>

<body onload="runTest();"></body>

</html>
